MAPLES MARK A

PrivateCIK: 1868939

Location

SPRINGFIELD, MO

MAPLES MARK A sold 1.45K shares of GREAT SOUTHERN BANCORP, INC. on the open market

Open‑market sale worth $86.9K. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

MAPLES MARK A

Filed: 12/1/2025ACC: 0001214659-25-017373

InsiderMAPLES MARK ACIK 1868939

→

IssuerGREAT SOUTHERN BANCORP, INC.CIK 854560

Other

Since Jul 2021

-1.45K

Net shares

Net seller

$86.9K

Total sold

1

Open market trades

0B · 1S

5

Total transactions

1.45K acquired · 2.90K disposed

Non-Derivative Transactions3

Common Stock

Direct

M · Option Exercise

Shares

+250.00

Price / share

$41.74

Trade value

$10.44K

% of position

New position

11/25/2025

0.00→250.00

Common Stock

Direct

M · Option Exercise

Shares

+1.20K

Price / share

$53.22

Trade value

$63.86K

% of position

480.0%

11/25/2025

250.00→1.45K

Common Stock

Direct

S · Sale

Shares

−1.45K

Price / share

$59.93

Trade value

$86.90K

% of position

New position

11/25/2025

1.45K→0.00

Total

Net shares

+0.00

Net value

-$12.60K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	11/25/2025	M · Option Exercise	+250.00	$41.74	$10.44K	New position	0.00	250.00
Common Stock Direct	11/25/2025	M · Option Exercise	+1.20K	$53.22	$63.86K	480.0%	250.00	1.45K
Common Stock Direct	11/25/2025	S · Sale	−1.45K	$59.93	$86.90K	New position	1.45K	0.00
Total			+0.00		-$12.60K

Derivative Transactions2

Option to purchase

Direct

M · Option Exercise

Converts to

Common stock

250.00 shares

Shares

−250.00

Strike price

41.74

Held after

0.00

Exercisable

—

11/25/2025

Option to purchase

Direct

M · Option Exercise

Converts to

Common stock

4.80K shares

Shares

−1.20K

Strike price

53.22

Held after

9.57K

Exercisable

—

11/25/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Option to purchase Direct	Common stock250.00 shares	11/25/2025	M · Option Exercise	−250.00	41.74	—	0.00
Option to purchase Direct	Common stock4.80K shares	11/25/2025	M · Option Exercise	−1.20K	53.22	—	9.57K

Non-Derivative Holdings (Post-Transaction)0

No non-derivative holdings reported

Derivative Holdings (Post-Transaction)4

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

2.37K

Shares owned

2.37K

Exercise price

57.98

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

3.60K

Shares owned

5.97K

Exercise price

61.55

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

4.80K

Shares owned

14.37K

Exercise price

61.79

Expiration

—

Exercise window

—

Option to purchase

Direct

Underlying security

Common stock

Underlying shares

4.80K

Shares owned

19.17K

Exercise price

57.29

Expiration

—

Exercise window

—

Total

Underlying

15.57K

Owned

41.90K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Option to purchase Direct	Common stock	57.98	—	—	2.37K	2.37K
Option to purchase Direct	Common stock	61.55	—	—	3.60K	5.97K
Option to purchase Direct	Common stock	61.79	—	—	4.80K	14.37K
Option to purchase Direct	Common stock	57.29	—	—	4.80K	19.17K
Total					15.57K	41.90K

MAPLES MARK A — Insider Transaction (Form 4) Filed Dec 1, 2025 | Finecho